Using the $_GET function

Is this code right for using a default variable, it's just I want it to use a default if it can't find the one from E.g. /index.php?id1=67&id2=78 it will use id2 if it can't find ID1?

<?php echo $_GET['id1']; if (!empty($_GET['id2'])) ?>

PHP:

ID1 being the one it's looking for and ID2 being the one it uses if it can't find ID one?

Is that right?

Thanks for your help!

 

<?php
if (!empty($_GET['id1'])) {
 echo $_GET['id1']) 
}
elseif (!empty($_GET['id2'])) {
 echo $_GET['id2']) 
}
?>

PHP:

 

Thanks do you know how I could get ID2 without having in the URL?

 

Use $_POST instead of $_GET

 

Then should I put the value I want instead of the ID2?

 

That would probably be best actually. If ID2 is a set default value for all, then yes

example:

<?php
if (!empty($_GET['id1'])) {
 $var =  $_GET['id1'];
}
else {
 $var =  "78"; //Value of ID2 (example)
}
echo "id number value = $var";

?>

PHP:

 

Ok, thanks for your help!